The Descent of Man

come red until the bird is at least a year old, at
which age the sexes resemble each other in all
respects. Both sexes of the wild turkey are ultimately
furnished with a tuft of bristles on the
breast, but in two-year-old birds the tuft is
about four inches long in the male and hardly
apparent in the female; when, however, the
latter has reached her fourth year, it is from
four to five inches in length. (31. On Ardetta,
Translation of Cuvier's 'Regne Animal,' by Mr.
Blyth, footnote, p. 159. On the Peregrine Falcon,
Mr. Blyth, in Charlesworth's 'Mag. of Nat. Hist.'
vol. i. 1837, p. 304. On Dicrurus, 'Ibis,' 1863, p.
44. On the Platalea, 'Ibis,' vol. vi. 1864, p. 366.
On the Bombycilla, Audubon's 'Ornitholog.
Biography,' vol. i. p. 229. On the Palaeornis, see,
also, Jerdon, 'Birds of India,' vol. i. p. 263. On
the wild turkey, Audubon, ibid. vol. i. p. 15; but
I hear from Judge Caton that in Illinois the female
very rarely acquires a tuft. Analogous
cases with the females of Petrocossyphus are